scripts: add test script for reading mavlink messages

Signed-off-by: Onur Özkan <work@onurozkan.dev>

.gitignore

@@ -6,6 +6,9 @@ target
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
+# Python bytecode caches
+__pycache__/
+
 # MSVC Windows builds of rustc generate these, which store debugging information
 *.pdb